You are right that Xabi has already informed the team management about the weaknesses of the team and has given them the requisition to take the necessary measures. I think the team management will take the necessary measures to take the squad to a stronger level considering their own capabilities.
I think the team that Xabi has only needs some slight changes, not a total overhaul of all lines. They have good players on the team. However, their performance may have changed with the implementation of the training patterns and game strategies applied by Xabi. They need to adapt and quickly adjust for team cooperation. Managing good players is certainly not easy.